From Sahih Muslim (Hadith 7056):
A'isha reported:I asked Allah's Messenger (ﷺ) about the words of Allah, the Exalted and Glorious:" The day when the earth would be changed for another earth and Heaven would be changed for another Heaven (XiV. 48), (and inquired: ) (Allah's Messenger), where would the people be on that day? He said: They would be on the Sirat
Reference: Muslim 7056